Add auto-configuration support for Embedded MongoDB

See gh-2002

spring-boot-autoconfigure/pom.xml

@@ -25,6 +25,11 @@
 			<artifactId>spring-boot</artifactId>
 		</dependency>
 		<!-- Optional -->
+		<dependency>
+			<groupId>de.flapdoodle.embed</groupId>
+			<artifactId>de.flapdoodle.embed.mongo</artifactId>
+			<optional>true</optional>
+		</dependency>
 		<dependency>
 			<groupId>com.atomikos</groupId>
 			<artifactId>transactions-jdbc</artifactId>

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/mongo/EmbedMongoAutoConfiguration.java

@@ -0,0 +1,35 @@
+package org.springframework.boot.autoconfigure.mongo;
+
+import com.mongodb.Mongo;
+import de.flapdoodle.embed.mongo.MongodExecutable;
+import de.flapdoodle.embed.mongo.MongodStarter;
+import de.flapdoodle.embed.mongo.config.IMongodConfig;
+import de.flapdoodle.embed.mongo.config.MongodConfigBuilder;
+import de.flapdoodle.embed.mongo.config.Net;
+import de.flapdoodle.embed.mongo.distribution.Version;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import java.io.IOException;
+
+import static de.flapdoodle.embed.process.runtime.Network.localhostIsIPv6;
+
+@Configuration
+@ConditionalOnClass({ Mongo.class, MongodStarter.class})
+public class EmbedMongoAutoConfiguration {
+
+	@Autowired
+	private MongoProperties properties;
+
+	@Bean(initMethod = "start", destroyMethod = "stop")
+	public MongodExecutable embedMongoServer() throws IOException {
+		IMongodConfig mongodConfig = new MongodConfigBuilder()
+				.version(Version.Main.PRODUCTION)
+				.net(new Net(properties.getPort(), localhostIsIPv6()))
+				.build();
+		return MongodStarter.getDefaultInstance().prepare(mongodConfig);
+	}
+
+}

spring-boot-autoconfigure/src/main/resources/META-INF/spring.factories

@@ -46,6 +46,7 @@ org.springframework.boot.autoconfigure.mail.MailSenderValidatorAutoConfiguration
 org.springframework.boot.autoconfigure.mobile.DeviceResolverAutoConfiguration,\
 org.springframework.boot.autoconfigure.mobile.DeviceDelegatingViewResolverAutoConfiguration,\
 org.springframework.boot.autoconfigure.mobile.SitePreferenceAutoConfiguration,\
+org.springframework.boot.autoconfigure.mongo.EmbedMongoAutoConfiguration,\
 org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration,\
 org.springframework.boot.autoconfigure.mongo.MongoDataAutoConfiguration,\
 org.springframework.boot.autoconfigure.mustache.MustacheAutoConfiguration,\

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/mongo/EmbedMongoAutoConfigurationTests.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2012-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *	  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.autoconfigure.mongo;
+
+import com.mongodb.CommandResult;
+import org.junit.After;
+import org.junit.Test;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.data.mongodb.core.MongoTemplate;
+
+import static org.junit.Assert.assertEquals;
+import static org.springframework.boot.test.EnvironmentTestUtils.addEnvironment;
+import static org.springframework.util.SocketUtils.findAvailableTcpPort;
+
+public class EmbedMongoAutoConfigurationTests {
+
+	private AnnotationConfigApplicationContext context;
+
+	@After
+	public void close() {
+		if (this.context != null) {
+			this.context.close();
+		}
+	}
+
+	@Test
+	public void shouldReturnVersionOfEmbeddedMongoServer() {
+		this.context = new AnnotationConfigApplicationContext();
+		int mongoPort = findAvailableTcpPort();
+		addEnvironment(context, "spring.data.mongodb.host=localhost", "spring.data.mongodb.port=" + mongoPort);
+		context.register(MongoAutoConfiguration.class, MongoDataAutoConfiguration.class, EmbedMongoAutoConfiguration.class);
+		context.refresh();
+		MongoTemplate mongo = context.getBean(MongoTemplate.class);
+		CommandResult buildInfo = mongo.executeCommand("{ buildInfo: 1 }");
+		assertEquals("2.6.1", buildInfo.getString("version"));
+	}
+
+}

spring-boot-dependencies/pom.xml

@@ -63,6 +63,7 @@
 		<derby.version>10.11.1.1</derby.version>
 		<dropwizard-metrics.version>3.1.2</dropwizard-metrics.version>
 		<ehcache.version>2.10.0</ehcache.version>
+		<embedmongo.version>1.46.4</embedmongo.version>
 		<flyway.version>3.2.1</flyway.version>
 		<freemarker.version>2.3.22</freemarker.version>
 		<elasticsearch.version>1.5.2</elasticsearch.version>
@@ -473,6 +474,11 @@
 				<artifactId>logback-classic</artifactId>
 				<version>${logback.version}</version>
 			</dependency>
+			<dependency>
+				<groupId>de.flapdoodle.embed</groupId>
+				<artifactId>de.flapdoodle.embed.mongo</artifactId>
+				<version>${embedmongo.version}</version>
+			</dependency>
 			<dependency>
 				<groupId>com.atomikos</groupId>
 				<artifactId>transactions-jdbc</artifactId>